rabbitmq 延时消息队列

//rabbitmq 延时消息队列 生产端 demo
//1.将消息发送到延时交换机对应的队列上delay-queue，指定过期时间；过期后转发的交换机和绑定的key
//2.过期时间过期后将消息转发到新的队列上；
//3.绑定新队列的消费者消费消息，到达延时消费的目的

 

1.//rabiitmq 延时消息队列 生产端 demo

//1.将消息发送到延时交换机对应的队列上delay-queue，指定过期时间；过期后转发的交换机和绑定的key
//2.过期时间过期后将消息转发到新的队列上；
//3.绑定新队列的消费者消费消息，到达延时消费的目的
public static void SendYanShi(string i)
{
var factory = new ConnectionFactory();
factory.HostName = "IP";//RabbitMQ服务在本地运行
factory.UserName = "admin";//用户名
factory.Password = "***";//密码
using (var connection = factory.CreateConnection())
{
using (IModel channel = connection.CreateModel())
{

Dictionary<string, object> dic = new Dictionary<string, object>();
dic = new Dictionary<string, object>();
dic.Add("x-dead-letter-exchange", "xxxn-mercadolibre-republish-site-exchange");//过期消息转向到新消息的交换机
dic.Add("x-dead-letter-routing-key", "key_1");//过期消息转向路由相匹配routingkey

//美客多重刊地方站点：延时交换机，延时队列名称：
channel.QueueDeclare(queue: "xxxn-mercadolibre-republish-site-delay-queue", durable: true, exclusive: false, autoDelete: false, arguments: dic);
channel.ExchangeDeclare(exchange: "xxxn-mercadolibre-republish-site-delay-exchange", type: ExchangeType.Direct, durable: true, autoDelete: false, arguments: null);

//美客多重刊地方站点：交换机，队列名称：
channel.QueueDeclare(queue: "xxxn-mercadolibre-republish-site-queue", durable: true, exclusive: false, autoDelete: false, arguments: null);
channel.ExchangeDeclare(exchange: "xxxn-mercadolibre-republish-site-exchange", type: ExchangeType.Direct, durable: true, autoDelete: false, arguments: null);

#region MyRegion
{
//绑定美客多重刊地方站点：延时交换机，延时队列名称：
channel.QueueBind(queue: "xxxn-mercadolibre-republish-site-delay-queue",
exchange: "xxxn-mercadolibre-republish-site-delay-exchange",
routingKey: "key_1");

//绑定美客多重刊地方站点：交换机，队列名称
channel.QueueBind(queue: "xxxn-mercadolibre-republish-site-queue",
exchange: "xxxn-mercadolibre-republish-site-exchange",
routingKey: "key_1");

string message = "这是一个延时消息" + i;

IBasicProperties properties = channel.CreateBasicProperties();
properties.Expiration = "5000"; //指定延时队列的过期时间，单位毫秒

channel.BasicPublish(exchange: "xxxn-mercadolibre-republish-site-delay-exchange",
routingKey: "key_1",
basicProperties: properties,
body: Encoding.UTF8.GetBytes(message));
Console.WriteLine($"message 已发送~~");

}
#endregion
}
}
}

 

2.//rabiitmq 延时消息队列 消费端 demo

public static void Consumer()IP
var factory = new ConnectionFactory();
factory.HostName = "ip";//RabbitMQ服务在本地运行
factory.UserName = "admin";//用户名
factory.Password = "****";//密码

using (var connection = factory.CreateConnection())
{
using (IModel channel = connection.CreateModel())
{
channel.QueueDeclare(queue: "xxxn-mercadolibre-republish-site-queue", durable: true, exclusive: false, autoDelete: false, arguments: null);
channel.ExchangeDeclare(exchange: "xxxn-mercadolibre-republish-site-exchange", type: ExchangeType.Direct, durable: true, autoDelete: false, arguments: null);
channel.QueueBind(queue: "xxxn-mercadolibre-republish-site-queue",
exchange: "xxxn-mercadolibre-republish-site-exchange",
routingKey: "key_1");

//rabbitMq消费消息是通过事件驱动的：
var consumer = new EventingBasicConsumer(channel);
consumer.Received += (model, ea) => //如果有消息进入到Rabbitmq，就会触发这个事件来完成消息的消费；
{
var body = ea.Body;
var message = Encoding.UTF8.GetString(body.ToArray());
Console.WriteLine($"接受消息: {message}");
};
channel.BasicConsume(queue: "xxxn-mercadolibre-republish-site-queue",
autoAck: true,
consumer: consumer);
};

}
}